As long as you are aware that mods will not only break your game once an update to the game is released and that using mods that add stuff to the game WILL break your world and character when said mod becomes abandonware, you can happily go modding.

Just remember that modding is always done at your own risk and that IronGate is not responsible for your broken worlds.

That said, I can highly recommend ThunderStore. You don't have to register, you can download over 1100 mods from the app itself. It will install, update and individually en-, or disable any mod you want. It will also take care of dependancies for you.

Pretty much the only way you should use mods in Valheim, IMHO. I use it myself and cannot recommend it highly enough.